/Engine/Source/Developer/MeshMergeUtilities/Public/MeshMergeDataTracker.h
Retrieves Raw Mesh ptr for the given MeshLOD key
[FMeshDescription](API\Runtime\MeshDescription\FMeshDescription) * GetRawMeshPtr ( [FMeshLODKey](API\Developer\MeshMergeUtilities\FMeshLODKey) Key )